My attempt to pay salaries and bonuses to my Faction members resulted in paying each of them twice. I was very careful to click the Pay Salaries and Bonuses button once as this same problem occurred once before. As it doesn't occur every time I suspect that it is my fault as always but I would like to stop doing it if possible.

I had that aswell one time.
Do not hover your mouse over "pay wages and bonuses" for to long, or you may click it on accident.
Luckely i could recover all of it by asking it all back from the members ^_^